Application of Boron-Containing Polyethylene Sheet in Engineering Field

Anti-neutron radiation or anti-nuclear radiation can effectively prevent the harm caused by nuclear radiation to the family and society, and it has various advantages of polyethylene board while isolating radiation. Studies have shown that boron-containing radiation-proof polyethylene board can effectively prevent the harm caused by nuclear radiation and neutron radiation to individuals and society, and has the following characteristics: 1. The wear resistance of boron-containing polyethylene board ranks first among plastics, and its molecular weight The larger the material, the higher the wear resistance and impact resistance of the material; 2. The impact strength of the boron-containing polyethylene sheet is the value in the existing plastics, even at 70 ℃, there is still a fairly high impact strength; 3. Self-lubricating 4. The water absorption rate of boron-containing polyethylene board is extremely low. Therefore, its physical and mechanical properties have nothing to do with the humidity factor in the working conditions used; 5. The boron-containing polyethylene sheet is chemically stable, and can resist various corrosive media such as acid, alkali, salt and organic compounds within a certain temperature and concentration range. Corrosion of solvents; 6. The boron-containing polyethylene board is tasteless, non-toxic, odorless, non-corrosive, and has physiological circulation and physiological adaptability. 7. Non-adhesive; 8. The molecular weight of the boron-containing polyethylene board exceeds 150 Ten thousand hours, the embrittlement temperature dropped to 140 ℃. Even under the action of liquid nitrogen, the ultra-high molecular weight polyethylene can be used at a temperature below 269 °C, and still has a certain mechanical strength. Definition of boron-containing ultra-high molecular weight polyethylene sheet: boron-containing ultra-high molecular weight polyethylene sheet is made by uniformly stirring boron carbide powder and lead powder in high-molecular polyethylene material through high-speed stirring, kneading, plasticizing and hot pressing It is a new type of composite shielding material.

It is a new type of hard shielding material developed by the Chinese Academy of Engineering Physics, and has been used for neutron and gamma ray protection in scientific research, nuclear engineering construction and medical and health departments. Batch products have been successfully used in my country's Qinshan Nuclear Power Plant Phase I and the first foreign aid nuclear power plant (Pakistan). The physical and chemical properties, anti-radiation properties and shielding effect of this product have been fully experimentally researched, and it has independent intellectual property rights. 2. Advantages of boron-containing polyethylene sheets: polyethylene is a hydrocarbon, with high hydrogen content, and has a good ability to weaken fast neutrons. Boron absorbs thermal neutrons and lead is particularly effective in shielding gamma radiation. Therefore, lead The boron polyethylene sheet has a comprehensive shielding effect of shielding fast neutrons, thermal neutrons and gamma radiation. The popularization and application of boron-containing polyethylene sheets can help simplify the shielding structure, reduce the weight of the shielding body, and reduce the volume of the shielding body. The boron-containing polyethylene sheet has good engineering properties, good dimensional stability, and satisfactory gamma radiation resistance. The operating temperature is 80~100 °C, and its shielding thermal neutron, fast neutron and gamma radiation performance is obviously better than polyethylene. , Research shows that boron-containing radiation-proof polyethylene board can effectively prevent the harm caused by nuclear radiation and neutron radiation to individuals and society. 3. Application field and market analysis: It is used as a radiation shielding and absorbing material for spent fuel in nuclear power plants and product tanks for nuclear experiments, neutron beam collimators, neutron traps, medical and health care, etc. At present, my country's nuclear power construction has entered the stage of large-scale construction from the initial stage, but in general, my country's nuclear power construction still has problems such as small scale and low autonomy. my country's planned nuclear power installed capacity will increase from 1% to 4% of the total installed power capacity. The construction of nuclear power plants mainly adopts the combination of imported foreign technology and independent construction, and there is a strong demand for localization of auxiliary equipment and materials. The neutron absorption board produced has been used by domestic and foreign users for many years, and the use effect has proved that it can completely replace foreign imported products and has a good market prospect.